Roof grid types

Variables
const int	Bottom = 2
	Bottom faces of a roof.
const int	Cut = 7
	Faces appearing as a result of cutting a roof by other objects.
const int	OpeningBottom = 5
	Bottom face appearing as a result of insertion of an aperture.
const int	OpeningSide = 4
	Side faces appearing as a result of insertion of an aperture.
const int	OpeningTop = 6
	Top face appearing as a result of insertion of an aperture.
const int	Side = 1
	Side faces of a roof.
const int	Top = 3
	Top faces of a roof.
const int	Undefined = 0
	Undefined.

Possible grid types for a Roof mesh